/Engine/Source/Editor/UnrealEd/Public/Settings/BlueprintEditorProjectSettings.h
class UBlueprintEditorProjectSettings : public [UDeveloperSettings](API\Runtime\DeveloperSettings\Engine\UDeveloperSettings)
TArray<TSoftCl...
BaseClassesToAllowRecompilingDuringPlayInEditor
Any blueprint deriving from one of these base classes will be allowed to recompile during Play-in-Editor (This setting exists both as an editor preference and project setting, and will be allowed if listed in either place)
uint8:  1
bEnableChildActorExpansionInTreeView
Enable the option to expand child actor components within component tree views (experimental).
uint8:  1
bValidateUnloadedSoftActorReferences
If enabled, the editor will load packages to look for soft references to actors when deleting/renaming them.
EChildActorComp...
DefaultChildActorTreeViewMode
Default view mode to use for child actor components in a Blueprint actor's component tree hierarchy (experimental).
TArray<FName>
DisabledCompilerMessages
List of compiler messages that have been suppressed completely - message suppression is only advisable when using blueprints that you cannot update and are raising innocuous warnings.
TArray<FName>
DisabledCompilerMessagesExceptEditor
List of compiler messages that have been suppressed outside of full, interactive editor sessions for the current project - useful for silencing warnings that were added to the engine after project inception and are going to be addressed as they are found by content authors
TArray<FString...
NamespacesToAlwaysInclude
A list of namespace identifiers that all Blueprint assets in the project should import by default. Requires Blueprint namespace features to be enabled in editor preferences. Editing this list will also cause any visible Blueprint editor windows to be closed.
TArray<FString...
SuppressedDeprecationMessages
List of deprecated UProperties/UFunctions to supress warning messages for - useful for source changes that would otherwise cause content warnings The easiest way to populate this list is using the context menu on nodes with deprecated references